Stupid ART-13 Tricks

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KL7OF:
You can run.........but you cannot hide......  GOOD STUFF ROGER!

KM1H:
You can replace the 811's with 811A's for a bit more dissipation or 572B's if you want to see what it takes to blow the mod xfmr.

I use the ER keying circuit and the ATC spends most of its time on 17M AM and CW except this past weekend when I was chasing the big ships on other bands. Normally use a hopped up BC-312 but put the RBB/RBC on line to make it all Navy.

Carl
KM1H

k4kyv:
I use the 1600v TV sweep transistor to cathode key all my rigs.  It cuts the voltage across the key back to about 6 volts and a few milliamps.  My Gates would be especially hard on my Vibroplex bug, since the keyed stage (pair of 807's) runs about 200 ma.

In my HF-300 rig I had to neutralise the keyed stage, the 802 buffer/pre-driver, to eliminate the back wave.  I tried using an 807 in that stage, but had the same back wave problem. Plus the 807 was somewhat squirrelly, while the 802 is nice and stable with velvet-smooth tuning.

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